It will save considerable machining time to use more than one tool in one machine to perform several machine operations either in sequence or simultaneously.
在一台机器上使用数种刀具来顺次或同时进行几项机器操作，将节省大量加工时间。
《新英汉大辞典》
2
He observed when people were machining cannon barrels, a lot of heat was generated, and there was a lot of work done.
他发现人们在制作炮管时，会产生大量的热，同时有大量的做功。
3
They also must distinguish between corrosion pits, cracks and welded machining repairs.